DEM simulations of a bio-inspired site characterization probe with two anchors
DEM simulations of a bio-inspired site characterization probe with two anchors
复制标题
具有两个锚点的仿生位点表征探针的 DEM 模拟
DOI:
10.1007/s11440-022-01684-5
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发表时间:
2022
期刊:
影响因子:
5.7
通讯作者:
DeJong, Jason
中科院分区:
文献类型:
--
作者:
Chen, Yuyan;Martinez, Alejandro;DeJong, Jason
Insufficient reaction force generated by installation equipment is one of the main challenges in soil penetration processes, which can lead to refusal conditions or pullout failures during in situ testing, soil sampling, and pile driving. Recent research has focused on developing probes for site characterization that can generate the reaction force required for probe insertion without external equipment. This study presents the results of 3D discrete element modeling (DEM) simulations of probes with single or dual anchors performed in a virtual calibration chamber (VCC) that applies a constant overburden pressure of 100 kPa. Following penetration of the probe to the desired depth, the anchors are expanded and then a single tip advancement stage is simulated using either displacement-controlled or force-limited motion. The simulation results indicate that dual-anchor probes generate greater capacities than single-anchor probes due to the mobilization of additional bearing forces. However, the capacity per anchor increases with increasing inter-anchor spacing due to the development of an active zone below the leading anchor which produces a decrease in effective stresses around the trailing anchor. During expansion of the anchors, the penetration resistances decrease due to the alteration of stresses around the probe tip. The simulation results are used to define a dimensionless 3D space to determine the combination of probe configurations that enable self-penetration; these configurations include greater inter-anchor spacings, smaller anchor-tip distances, and greater anchor expansion magnitudes.
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DOI:
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发表时间:
1968
期刊:
影响因子:
--
作者:
E. R. Trueman
通讯作者:
E. R. Trueman
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
R. Borela;J. D. Frost;Giulia M. B. Viggiani;F. Anselmucci
通讯作者:
F. Anselmucci
DOI:
10.1061/9780784482803.038
发表时间:
2020-02
期刊:
--
影响因子:
--
作者:
K. C. Kuei;J. DeJong;Alejandro Martinez
通讯作者:
K. C. Kuei;J. DeJong;Alejandro Martinez
DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
C. Purdy;A. J. Raymond;J. DeJong;A. Kendall
通讯作者:
A. Kendall
影响因子:
5.9
作者:
A. J. Raymond;James R. Tipton;A. Kendall;J. DeJong
通讯作者:
J. DeJong